extra heavy

基本解釋

You may have noticed that you feel extra heavy, lethargic, that you feel gravity’s pull is greater.
你可能已經(jīng)覺(jué)察到那時(shí)候的你感到非常沉重，昏昏欲睡，感覺(jué)地心引力都變得更大。
Along this line 20,000-ton coal trains can reach a length of over 7 km pulled by powerful electric locomotives over an extra heavy duty track and driving down operating costs.
大秦線上運(yùn)行的兩萬(wàn)噸運(yùn)煤列車(chē)長(zhǎng)度可達(dá)7公里，由大功率電力機(jī)車(chē)牽引，大大降低了運(yùn)營(yíng)成本。
Though I lost weight by doing body building, I used to do three out of four sets with light weights, the fourth set was extra heavy just to make me feel good (see point below).
雖然我是通過(guò)健身法來(lái)減肥的，但我曾做四組力量訓(xùn)練，前三組的重量輕，第四組要重——這只不過(guò)是讓自己感覺(jué)幫一些罷了（見(jiàn)下一條）。

Discounts for big users are tiny because of the heavy extra costs imposed by the government to subsidise renewable energy sources (due to provide 20% of capacity by 2020) and to reduce the life of nuclear power plants to 32 years (from 50 years).
ECONOMIST: German business